Hundreds of social activists, journalists, people's forums and various political party workers from across the country on Tuesday took out a protest rally here condemning the murder of journalist-activist Gauri Lankesh a week ago.

"Chief Minister (Siddaramaiah) has given instructions to intensify the investigation and nab the culprits as soon as possible. We have given enough officials to the SIT, if they need additional officers we are ready to give," Reddy said.

The Centre on Wednesday sought a detailed report from the Karnataka government even as Chief Minister Siddaramaiah ordered a probe by the Special Investigation Team (SIT) into the killing of journalist-activist Gauri Lankesh.